Physics131_L01WI10

Physics131_L01WI10 - Physics 131 - Mechanics Le cture1 (C...

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Physics 131 - Mechanics Lecture 1 (Chapter 1) Units January 4, 2010 Homeyra Sadaghiani
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January 9, 2008 Physics 131 - Lecture 2 2 Announcements HW#0 is due at 9AM on Friday, January 8th. Class introduction is due Sunday January 10 th by midnight. The i-Clickers for this class may be registered on the Web at: http://www.iclicker.com/registration/
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Week Date L# Lecture topic Text reading HW 1 4-Jan 1 Description of course structure, SI units 6-Jan 2 Motion, position, velocity, acceleration 1.1-8 (26 P) HW#0 8-Jan 3 One-dimensional motion 2.1-3 (14 P) 2 11-Jan F1 Furlough (Constant acceleration -Tutorial)   13-Jan 4 Vectors 3.1-4 (13 P) HW#1   15-Jan 5 Constant acceleration 2.4-7 (14 P)   3 18-Jan H1 Holiday (Martin Luther King's Birthday)   20-Jan 6 Two- dimensional motion 4.1-3 (12 P) HW#2   22-Jan 7 Circular and relative motion 4.3-7 (14 P) 4 25-Jan 8 Force, mass, inertial frames 5.1-4 (11 P)   27-Jan 9 5.5-7 (8 P) HW#3 29-Jan E1 EXAM 1- Chapters 1-4 January 7, 2009 Physics 131 - Lecture 1 3 Lecture Schedule We are here!
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January 7, 2009 Physics 131 - Lecture 1 4 Standard International Units Standard International (SI) Units (also known as MKS) Mass: kilogram kg Length: meter m Time: second s Unit Conversions 1 in = 2.54 cm 1 cm = 0.3937 in 1 mi = 1.609 km 1 km = 0.621 mi 1 mph = 0.447 m/s 1 m/s = 2.24 mph Note: the English pound unit is a measure of force or weight , not mass. A kilogram has a weight of 2.2046 pounds at standard gravity. } English Units (Used only in USA, Liberia, and Myanmar) Units for almost all other physical quantities can be constructed from mass, length, and time, so these are the fundamental units.
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The kilogram was originally defined as the mass of 1 liter of water at 4 o C. Currently, 1 kilogram is the mass of the international standard kilogram, a polished platinum-iridium cylinder stored in S è veres, France. (It is currently the only SI unit defined by a manufactured object.) Avagadro’s number of carbon-12 atoms (6.02214199… x 10 23 ) has a mass of exactly 12 kg. January 7, 2009 Physics 131 - Lecture 1 5 SI Mass Unit - kilogram (kg)
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January 7, 2009 Physics 131 - Lecture 1 6 SI Length Unit - meter (m) The meter was originally defined as 1/10,000,000 of the distance from the Earth’s equator to its North pole on the line of longitude that passes through Paris. Currently, 1 meter is the distance traveled by light in 1/299,792,458 of a second.
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Physics 131 - Lecture 1 7 SI Time Unit - second (s) The second was originally defined as (1/60)(1/60)(1/24) of a mean solar day. Currently, 1 second is defined as 9,192,631,770 oscillations of the radio waves absorbed by a vapor of cesium-133 atoms. 13
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Physics131_L01WI10 - Physics 131 - Mechanics Le cture1 (C...

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